A painful burning sensation in the chest caused by gastroesophageal reflux (backflow from the stomach irritating the esophagus)

• Symptomatic of an ulcer or a diaphragmatic hernia or other disorder

Wikipedia Word definitions in Wikipedia
Pyrosis is a genus of moth in the family Lasiocampidae .

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Pyrosis \Py*ro"sis\, n. [NL., fr Gr. ? a burning, an inflammation, fr. ? to burn, fr. ? fire.] (Med.) See Water brash , under Brash .

WordNet Word definitions in WordNet
n. a painful burning sensation in the chest caused by gastroesophageal reflux (backflow from the stomach irritating the esophagus); symptomatic of an ulcer or a diaphragmatic hernia or other disorder [syn: heartburn ]

Wiktionary Word definitions in Wiktionary
n. (context medicine English) A burning sensation in the chest due to reflux of stomach contents in the esophagus.